Transcript
7/27/2019 1 Harrawood NCAT-IsSA Conference Final
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NCAT
PreservationGroup Study Auburn University
ISSA, AEMA, ARRA Annual Conference
Feb 19th-22nd
Indian Wells, CA
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NCAT Pavement Test TrackFounded in 1986 - By the National Asphalt Paving Association &
Auburn University
-World leader and authority in hot mix asphalt research,
development, technology, and education in the areas of
•Structural Design
•Construction Methods
•Materials and Testing
•Performance Measurement and Prediction
•Pavement Preservation, Rehabilitation, Recycling, and Maintenance
•Environment and Highway Safety
- Accelerated Loading – compresses 10-15 years of truck traffic into 2
years
- - Almost continuous truck traffic
- 1st
research effort in pavement preservation
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NCAT Trucking Fleet
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FleetFive – 8 axle trucks weighing
140,000 each
Run from 5:00 am to 11:00 pm
daily
Approximately 680 miles per day
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Study Locations: (Auburn, Al) •
NCAT Test Track (various sections)(PP or reactive to distress trigger) •Lee Road 159 (multiple treatments placed within 2500’ section) Study Objectives: •Develop life cycle curve as compared to pretreatment condition
•Monitor pavement life extension of treated pavement
•Comparison of treatments will not be conducted by NCAT
- treatment to control section
Study Sponsors: Alabama DOT Oklahoma DOT
Mississippi DOT South Carolina DOT Missouri DOT Tennessee DOT North Carolina DOT FP-2 Inc.
Study Duration:
3 years
Preservation Group Study
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FP2 Committee
• Mike Buckingham (Colas)
• Jim Moulthrop (Fugro)
• Mark Ishee (Ergon Asphalt & Emulsion)
• Tim Harrawood (Vance Brothers, Inc.)
• Worked with NCAT to develop study
treatments, materials, construction practices,specifications and sequence of construction.
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NCAT Test Track Section
(List of Treatments)
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• Rejuvenating Fog Seal
• Triple Chip Seal
• FiberMat (with Lightweight Aggregate)
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Fog Seal (test track)(three locations)
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Triple Chip Seal (test track)
(TBST #7, #89, W10)
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hi l li i
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Chip Seal Application
(test track) (tbst)
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FiberMat
(test track) Light weight Aggregate
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Diamond Grinding
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Lee Road 159 Test Section
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Martin Marietta Quarry
Asphalt Plant
Lee Road 159
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Lee Road 159 Test Section
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Existing cracks werepainted during crackmapping operations
Crack width = ¼” and
smaller
Lee Road 159 Test Section
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Longitudinal crackspresent for entire length
of test section
Lee Road 159 Test Section
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6” of Granular Base
#78 Stone Surface Treatment (chip seal)
#5 Stone Surface Treatment (chip seal)
Prime Coat
1 3/8” Surface Mix (HMAC)
1 3/8” Surface Mix (HMAC)
3 1/8” Binder Mix (HMAC)
#78 Stone Surface Treatment (chip seal) CoresIndicate
5 to 5 5/8”
Pavement
Thickness
1999
Late
1980’s
Lee Road 159 Test Section
1974
•Existing Surface is thirteen years old
•Study to take place on both inbound and outbound
lanes
•Quarry & Asphalt Plant w ill provide truck trafficinformation complete with tare and gross vehicle
weights.
• Appears to be structurally sound
•Rutting = none-minor
•Cracking = severe in outbound wheel paths/
moderate on inbound lane
Late
1980’s
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2012 Preservation Group (PG) Study
• Fog seals (with and without rejuvenators) • Crack seals (routing/filling, hot air lance, go-type)
• Chip seals (single, double, triple, scrub, FiberMat)
• Cape seals (on chip/scrub seals, FiberMat)
• Micro surfacing (single, double, Capes)
• Plant mix overlays (4.75 screening mix variations)
• Ultra thin bonded wearing course
• Lightweight aggregates for surface treatments
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Cell Treatment -1 Conventional fog Seal
1 Rejuvenating Fog seal
2 FiberMat Chip Seal
3 Control Section
4 Control Section
5 Crack Sealing (Rout & Seal in Inbound Lane - Blow and Seal in Outbound Lane)
6 Single Layer Chip Seal
7 Single Layer Chip Seal over Crack Sealing
8 Triple Layer Chip Seal
9 Double Layer Chip Seal
10 Cape Seal (Micro Surfacing over Single Layer Chip Seal)
11 Single Layer Micro Surfacing
12 Single Layer Micro Surfacing over Crack Sealing
13 Double Layer Micro Surfacing
14 Cape Seal (MicroSurfacing over Single Layer FiberMat)
15 Cape Seal (MIcroSurfacing over Single Layer Scrub Seal)
16 Scrub Seal Single Layer Chip Seal
17 FibetMat Single Layer Chip Seal 18 HMA Cape Seal (4.75 NMAS thin "screenings mix" virgin mix with PG67-22 over FibetMat Chip Seal)
19 4.75 NMAS thin "screenings mix" virgin mix with PG67-22
20 4.75 NMAS thin "screenings mix" virgin mix with PG67-22 on 100% foamed recycle 6 inch inlay)
21 4.75 NMAS thin "screenings mix" virgin mix with PG76-22
22 Ultra Thin Bonded Surface Course placed with spray paver
23 4.75 NMAS thin "screenings mix" 50% FRAP (54% aged Binder) overlay with PG67-22 Virgin Binder
24 4.75 NMAS thin "screenings mix" 5% PCRAS (19% aged Binder) virgin overlay with PG67-22 Virgin Binder25 4.75 NMAS thin "screenings mix" virgin overlay with Kraton High Polymer PG88-22 Binder
List of Treatments (Lee Road 159)
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Treatment Layout
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Section Breakdown(section #10 Cape Seal) (Chip Seal/Micro)
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• 40 individual cells per 100’ test section
• Cell size = 5’wide x 10’ long
• 1,012 cells on Lee Road 159
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Treatment Materials
• Fog Seals
- Conventional (CSS-1H) Emulsion
- Rejuvenating (CMS-1P) (QB) Emulsion
• Crack Treatments
-ASTM D-6690
• FiberMat
-Colas Emulsion
- #89 Granite 3/8” (lee Road 159)
- Lightweight Aggregate (Test Track)
• Scrub Seal -CMS-1P (CR) Emulsion
- #89 Granite 3/8”
• Chip Seals -CRS2-HP Emulsion
- #7 Granite ½”
-#89 Granite 3/8”
-W-10’s Granite ¼ minus, dense graded
• Micro Surfacing
-CSS-1HP
-#821 Limestone (ISSA type 2)
• Hot Mix Treatments -Various sources
-RAP, RAS, HIMA,
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Study Challenges• Logistics, Logistics, Logistics
• 8 different emulsions, 3 emulsion suppliers (small qty’s)• 16 separate treatments
• 9 different combinations of treatments
• Multiple sources of aggregate
• Continuous string of 100 foot sections
•High production equipment / Small sections
• Protection of adjacent test sections
• Quarry & asphalt plant traffic
• Multiple calibrations
• Verification of application rates
• Concurrent paving operations
• Weather (major rain event during construction phase)
• Asphalt Plant breakdown
• County Grading Operations
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Ch ll
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Challenges(protecting adjacent test sites)
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Ch ll
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Challenges(protecting adjacent test sites)
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Concurrent Paving Operations
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Lee Road 159 Construction sequence
• FiberMat by Strawser on 7/17/12 (grader damage)
• Week of August 6th was busy and challenging
– Fog Seals/Crack Treatments/Chip Seal /Scrub Seals &
Micro Surfacing by Vance Brothers– 100% foamed recycle mix by Lanford Brothers
– Inbound thin overlays by East Alabama Paving (EAP)
• Outbound thin overlays by EAP on 8/13/12• Outbound bonded with Astec spray paver 8/28/12
• FiberMat on 159 by Strawser 9/19/12 (+W2lightweight)
C lib ti & V ifi ti
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Calibration & VerificationChip Seal Aggregate/Application Rate
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Calibration & VerificationChip Seal Aggregate/Application Rate
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Calibration & Verification
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Calibration & VerificationChip Seal Aggregate/Application Rate
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lib i & ifi i
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Calibrations & VerificationsEmulsion Application Rates
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C lib ti & V ifi ti
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Calibrations & VerificationsEmulsion Application Rates
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li i
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Application Rates
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Install Treatment Application Aggregate Aggregate Emulsion Emulsion Length Width Total Diluted Diluted
Emulsion
gals Water gals
Aggregat
e
Cell Date Lane Source Type Source Type
Square
Yards App Rate/Sqy Mix used Used Used
App/Rat
e
1 8/6/2012
Rejuvenating Fog
seal Inbound N/A N/A
Ergon A
& E
CMS-1P
(QB) 100 12 133.00 0.085 11.305 5.653 5.653 N/A
1 8/6/2012
Rejuvenating Fog
seal Outbound N/A N/A
Ergon A
& E
CMS-1P
(QB) 100 12 133.00 0.083 11.039 5.520 5.520 N/A
Totals 266.00 0.084 22.344 11.172 11.172
Cell Install Treatment Application Agg Emul Emul Len Wid Total Emul Emul AGG Lbs Agg Tons Agg
Date Lane Type Source Type SQY % Gals used App Rate Used Used
13 8/10/2012 MicroSurfacing (double) 1st lift Inbound Limestone Ergon CSS-1HP 100 12 133 12% 34.92 18.6 2,473.80 1.24
13 8/10/2012 MicroSurfacing (double) 1st lift Outbound Limestone Ergon CSS-1HP 100 12 133 12% 29.85 15.9 2,114.70 1.06
13 8/10/2012 MicroSurfacing (double) 2nd lift Inbound Limestone Ergon CSS-1HP 100 12 133 12% 33.23 17.7 2,354.10 1.18
13 8/10/2012 MicroSurfacing (double) 2nd lift Outbound Limestone Ergon CSS-1HP 100 12 133 12% 38.12 20.3 2,699.90 1.35
532 12% 136.12 18.125 9,642.50 4.83
Total Total Avg Total Total
Rejuvenating Fog Seal
Micro Surfacing (double)
Treatment Application
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Treatment Application(Micro Surfacing 1st lift)
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FiberMat
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Crack TreatmentsRout & Seal
(inbound Lane)
Blow & Seal
(outbound Lane)
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C k T t t
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Crack Treatment (rout & seal)
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Chip Seal
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Chip Seal
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Micro Surfacing
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Scrub Seal
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Testing Overview
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• ARAN Van– Weekly
• Video for crack mapping
– Weekly
• Friction (skid number)
– Monthly
• Moisture probe
– Monthly
• Falling weight deflectometer
– Monthly
• Capturing data weekly &
monthly
• Currently compiling data
• 1st
Review with studysponsors held on Dec 19th
& 20th 2012
• 2nd review scheduled for
June 6th & 7th 2013
R i C l
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Review Cycle
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• 1
st
Review with study sponsors held on Dec 19
th
& 20
th
2012• 2nd review scheduled for June 6th & 7th 2013
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Early Observation
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Early Observation
43Micro Surfacing (single lift, type II, App rate – 16.40)
Cape Seal – Chip Seal (single lift, #89 stone, CRS2-HP shot rate – 0.295 followed by
Micro Surfacing – Single Lift, Type II, App rate – 17.00)
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Study Importance
• Reflects a shift in philosophy from agencies
- worst first to pavement preservation
• Will provide data that will assist pavement managerswith treatment selection
-Right Treatment, Right Road, Right Timing
• Will reinforce the value of PP to agencies that alreadyhave robust PP programs
• encourage innovation to enhance current and futuretreatments to better mitigate pavement distress’s
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Special Thanks
• FP2 Inc. (sponsors) (committee)• Bryan Horner (E.D. Etnyre)
• Mark Ishee (Ergon Asphalt & Emulsions)
• Kenneth Buice (Crafco, Inc.)
• Crews from:
Strawser, Inc.
East Alabama Paving
Vance Brothers, Inc.
• Dr. Buzz Powell and the staff at NCAT45
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